Segment Reporting Segment Reporting (Schedule of Capital Expenditure Information, by Segment) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Oct. 31, 2014
Segment Reporting Information [Line Items]
Capital Expenditures	$ 16,982
Propane and related equipment sales [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	15,645
Midstream Operations [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	1,033
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	304
Maintenance Capital Expenditures [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	5,056
Maintenance Capital Expenditures [Member] | Propane and related equipment sales [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	4,576
Maintenance Capital Expenditures [Member] | Midstream Operations [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	176
Maintenance Capital Expenditures [Member] | Corporate and Other [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	304
Growth Capital Expenditures [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	11,926
Growth Capital Expenditures [Member] | Propane and related equipment sales [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	11,069
Growth Capital Expenditures [Member] | Midstream Operations [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	857
Growth Capital Expenditures [Member] | Corporate and Other [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	0
Ferrellgas, L.P. [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	16,982
Ferrellgas, L.P. [Member] | Propane and related equipment sales [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	15,645
Ferrellgas, L.P. [Member] | Midstream Operations [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	1,033
Ferrellgas, L.P. [Member] | Corporate and Other [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	304
Ferrellgas, L.P. [Member] | Maintenance Capital Expenditures [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	5,056
Ferrellgas, L.P. [Member] | Maintenance Capital Expenditures [Member] | Propane and related equipment sales [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	4,576
Ferrellgas, L.P. [Member] | Maintenance Capital Expenditures [Member] | Midstream Operations [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	176
Ferrellgas, L.P. [Member] | Maintenance Capital Expenditures [Member] | Corporate and Other [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	304
Ferrellgas, L.P. [Member] | Growth Capital Expenditures [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	11,926
Ferrellgas, L.P. [Member] | Growth Capital Expenditures [Member] | Propane and related equipment sales [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	11,069
Ferrellgas, L.P. [Member] | Growth Capital Expenditures [Member] | Midstream Operations [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	857
Ferrellgas, L.P. [Member] | Growth Capital Expenditures [Member] | Corporate and Other [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	$ 0